132 lines
4.4 KiB
C
132 lines
4.4 KiB
C
/*
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* Copyright 2007, Haiku, Inc. All Rights Reserved.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _FSSH_BYTEORDER_H
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#define _FSSH_BYTEORDER_H
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#include <endian.h>
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// platform endian.h
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#include "fssh_defs.h"
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// swap directions
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typedef enum {
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FSSH_B_SWAP_HOST_TO_LENDIAN,
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FSSH_B_SWAP_HOST_TO_BENDIAN,
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FSSH_B_SWAP_LENDIAN_TO_HOST,
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FSSH_B_SWAP_BENDIAN_TO_HOST,
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FSSH_B_SWAP_ALWAYS
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} fssh_swap_action;
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// BSD/networking macros
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#ifndef fssh_htonl
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# define fssh_htonl(x) FSSH_B_HOST_TO_BENDIAN_INT32(x)
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# define fssh_ntohl(x) FSSH_B_BENDIAN_TO_HOST_INT32(x)
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# define fssh_htons(x) FSSH_B_HOST_TO_BENDIAN_INT16(x)
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# define fssh_ntohs(x) FSSH_B_BENDIAN_TO_HOST_INT16(x)
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#endif
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// always swap macros
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#define FSSH_B_SWAP_DOUBLE(arg) __fssh_swap_double(arg)
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#define FSSH_B_SWAP_FLOAT(arg) __fssh_swap_float(arg)
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#define FSSH_B_SWAP_INT64(arg) __fssh_swap_int64(arg)
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#define FSSH_B_SWAP_INT32(arg) __fssh_swap_int32(arg)
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#define FSSH_B_SWAP_INT16(arg) __fssh_swap_int16(arg)
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#if BYTE_ORDER == __LITTLE_ENDIAN
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// Host is little endian
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#define FSSH_B_HOST_IS_LENDIAN 1
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#define FSSH_B_HOST_IS_BENDIAN 0
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// Host native to little endian
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#define FSSH_B_HOST_TO_LENDIAN_DOUBLE(arg) (double)(arg)
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#define FSSH_B_HOST_TO_LENDIAN_FLOAT(arg) (float)(arg)
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#define FSSH_B_HOST_TO_LENDIAN_INT64(arg) (uint64_t)(arg)
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#define FSSH_B_HOST_TO_LENDIAN_INT32(arg) (uint32_t)(arg)
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#define FSSH_B_HOST_TO_LENDIAN_INT16(arg) (uint16_t)(arg)
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// Little endian to host native
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#define FSSH_B_LENDIAN_TO_HOST_DOUBLE(arg) (double)(arg)
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#define FSSH_B_LENDIAN_TO_HOST_FLOAT(arg) (float)(arg)
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#define FSSH_B_LENDIAN_TO_HOST_INT64(arg) (uint64_t)(arg)
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#define FSSH_B_LENDIAN_TO_HOST_INT32(arg) (uint32_t)(arg)
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#define FSSH_B_LENDIAN_TO_HOST_INT16(arg) (uint16_t)(arg)
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// Host native to big endian
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#define FSSH_B_HOST_TO_BENDIAN_DOUBLE(arg) __fssh_swap_double(arg)
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#define FSSH_B_HOST_TO_BENDIAN_FLOAT(arg) __fssh_swap_float(arg)
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#define FSSH_B_HOST_TO_BENDIAN_INT64(arg) __fssh_swap_int64(arg)
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#define FSSH_B_HOST_TO_BENDIAN_INT32(arg) __fssh_swap_int32(arg)
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#define FSSH_B_HOST_TO_BENDIAN_INT16(arg) __fssh_swap_int16(arg)
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// Big endian to host native
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#define FSSH_B_BENDIAN_TO_HOST_DOUBLE(arg) __fssh_swap_double(arg)
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#define FSSH_B_BENDIAN_TO_HOST_FLOAT(arg) __fssh_swap_float(arg)
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#define FSSH_B_BENDIAN_TO_HOST_INT64(arg) __fssh_swap_int64(arg)
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#define FSSH_B_BENDIAN_TO_HOST_INT32(arg) __fssh_swap_int32(arg)
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#define FSSH_B_BENDIAN_TO_HOST_INT16(arg) __fssh_swap_int16(arg)
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#else // BYTE_ORDER
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// Host is big endian
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#define FSSH_B_HOST_IS_LENDIAN 0
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#define FSSH_B_HOST_IS_BENDIAN 1
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// Host native to little endian
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#define FSSH_B_HOST_TO_LENDIAN_DOUBLE(arg) __fssh_swap_double(arg)
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#define FSSH_B_HOST_TO_LENDIAN_FLOAT(arg) __fssh_swap_float(arg)
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#define FSSH_B_HOST_TO_LENDIAN_INT64(arg) __fssh_swap_int64(arg)
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#define FSSH_B_HOST_TO_LENDIAN_INT32(arg) __fssh_swap_int32(arg)
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#define FSSH_B_HOST_TO_LENDIAN_INT16(arg) __fssh_swap_int16(arg)
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// Little endian to host native
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#define FSSH_B_LENDIAN_TO_HOST_DOUBLE(arg) __fssh_swap_double(arg)
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#define FSSH_B_LENDIAN_TO_HOST_FLOAT(arg) __fssh_swap_float(arg)
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#define FSSH_B_LENDIAN_TO_HOST_INT64(arg) __fssh_swap_int64(arg)
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#define FSSH_B_LENDIAN_TO_HOST_INT32(arg) __fssh_swap_int32(arg)
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#define FSSH_B_LENDIAN_TO_HOST_INT16(arg) __fssh_swap_int16(arg)
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// Host native to big endian
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#define FSSH_B_HOST_TO_BENDIAN_DOUBLE(arg) (double)(arg)
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#define FSSH_B_HOST_TO_BENDIAN_FLOAT(arg) (float)(arg)
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#define FSSH_B_HOST_TO_BENDIAN_INT64(arg) (uint64_t)(arg)
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#define FSSH_B_HOST_TO_BENDIAN_INT32(arg) (uint32_t)(arg)
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#define FSSH_B_HOST_TO_BENDIAN_INT16(arg) (uint16_t)(arg)
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// Big endian to host native
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#define FSSH_B_BENDIAN_TO_HOST_DOUBLE(arg) (double)(arg)
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#define FSSH_B_BENDIAN_TO_HOST_FLOAT(arg) (float)(arg)
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#define FSSH_B_BENDIAN_TO_HOST_INT64(arg) (uint64_t)(arg)
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#define FSSH_B_BENDIAN_TO_HOST_INT32(arg) (uint32_t)(arg)
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#define FSSH_B_BENDIAN_TO_HOST_INT16(arg) (uint16_t)(arg)
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#endif // BYTE_ORDER
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern fssh_status_t fssh_swap_data(fssh_type_code type, void *data,
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fssh_size_t length, fssh_swap_action action);
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extern bool fssh_is_type_swapped(fssh_type_code type);
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// Private implementations
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extern double __fssh_swap_double(double arg);
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extern float __fssh_swap_float(float arg);
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extern uint64_t __fssh_swap_int64(uint64_t arg);
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extern uint32_t __fssh_swap_int32(uint32_t arg);
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extern uint16_t __fssh_swap_int16(uint16_t arg);
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#ifdef __cplusplus
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}
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#endif
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#endif // _FSSH_BYTEORDER_H
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